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MC1285472: Out-of-band updates released for Windows Server to address two issues

By: Author Alex Lim

Posted on

Categories Update

Home » Update » MC1285472: Out-of-band updates released for Windows Server to address two issues

Summary

  • Microsoft released out-of-band updates to resolve issues caused by the April 2026 Windows security update.
  • Affected devices include Windows Server 2025, which may face installation failures and repeated domain controller restarts.
  • The OOB update for Windows Server 2025 fixes both installation failure and domain controller restart issues, while updates for other versions focus only on restarts.
  • Additional guidance and installation instructions can be found in the respective KB articles for each Windows Server version.
  • Change categorization includes “Admin impact” and “PreventOrFixIssue,” highlighting the need for administrator action to avoid service disruptions.

Admin Impact: High
User Impact: Low
Release Start: 19 Apr 2026
Release End: 19 Apr 2026
Services: Windows
Category: Prevent or fix issues
Tags: Admin Action

History

4/19/2026 Item Added to Message Center

Microsoft Message

Microsoft has released out-of-band (OOB) updates today, April 19, 2026, to address issues introduced by the April 2026 Windows security update.

A limited number of Windows Server 2025 devices might experience failures installing the April 2026 security update (KB5082063). In addition, some versions of Windows Server may experience domain controllers restarting repeatedly after installing the April 2026 security update.

To address these issues, Microsoft has released OOB updates for the Windows Server versions listed below. Note: The Windows Server 2025 OOB update (KB5091157) addresses both the installation failure issue and the domain controller restart issue. OOB updates released for other supported Windows Server versions address only the domain controller restart issue.

For complete guidance and installation instructions, see the relevant KB articles:

Standard Windows updates

  • Windows Server 2025: KB5091157 (OS Build 26100.32698) Out-of-band
  • Windows Server, version 23H2: KB5091571 (OS Build 25398.2276) Out-of-band
  • Windows Server 2022: KB5091575 (OS Build 20348.5024) Out-of-band
  • Windows Server 2019: KB5091573 (OS Build 17763.8647) Out-of-band
  • Windows Server 2016: KB5091572 (OS Build 14393.9062) Out-of-band

Windows hotpatch updates

  • Windows Server 2025 Datacenter: Azure Edition: Hotpatch KB5091470 (OS Build 26100.32704) Out-of-band
  • Windows Server 2022 Datacenter: Azure Edition: Hotpatch KB5091576 (OS Build 20348.5029) Out-of-band